Method for preparing high-purity tetraethylammonium hydroxide by continuous electrolysis

Abstract

The invention discloses a method for preparing high-purity tetraethylammonium hydroxide by continuous electrolysis. The method comprises the following steps: placing tetraethylammonium salt aqueous liquor with the raw material concentration of 30-50% in an anode chamber of a two-chamber one-membrane ionic membrane electrolysis device, adding tetraethylammonium hydroxide with the concentration of 2-5% into a cathode chamber of the device, and communicating current between an anode plate and a cathode plate, wherein in the anode chamber, tetraethylammonium salt is hydrolyzed to generate cation (CH3CH2)4N<+> and anion X<->, the cations (CH3CH2)4N<+> and H<+> and a metal cation Rn<+> in the liquor enter the cathode chamber through a cation exchange membrane, and the anions X<-> and OH<-> reach the anode plate to generate a gas; in the cathode chamber, tetraethylammonium hydroxide is produced from the cation (CH3CH2)4N<+> and OH<-> obtained by water hydrolysis, H<+> reaches the cathode plate to obtain electrons to generate H2, and tetraethylammonium hydroxide with the concentration of 5-30% is obtained. According to the method disclosed by the invention, feed and discharge are continuously carried out, and the concentrations of the materials in the anode and cathode chambers are relatively constant, so that the current efficiency and the product conversion ratio are improved, and the energy consumption is lowered.

Description

Technical field

[0001] The present invention involves a method of preparation of ammonium oxide of ethyl -based, specifically refers to the use of tetrabon ammonium salt as the raw material.method. Background technique

[0002] Tetrachide (Teah) is an organic alkali that can be used as a phase metastatic catalyst, a templates made of molecular sieve, a cleaning agent, and an oil industry dehydration agent.Separate tetrachinonium chloride; then washed and exchanged ion exchange with high -efficiency alkaline resin to obtain tetraonethyl hydrotide ammonium oxide rough products. Finally, it was concentrated by decompression to obtain the finished product of ammonium oxide.This preparation method is two reactions of gas and liquid, long time, and low product revenue.

[0003] In the patent document of the Chinese patent public account of CN1347872A, a method of using tetrachloride as a raw material and the exchange with strong alkaline anion resin to prepare tetramidized ammonium oxi...

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